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                                <h2 id="&#x6982;&#x8FF0;">&#x6982;&#x8FF0;</h2>
<p>try catch&#x5757;&#x662F;&#x6211;&#x4EEC;&#x7F16;&#x7A0B;&#x8FC7;&#x7A0B;&#x4E2D;&#x7ECF;&#x5E38;&#x7528;&#x5230;&#x7684;&#xFF0C;&#x4E5F;&#x662F;&#x9762;&#x8BD5;&#x65F6;&#x7ECF;&#x5E38;&#x9047;&#x5230;&#x7684;&#xFF0C;&#x4F1A;&#x95EE;&#x5230;&#x4E00;&#x4E9B;&#x6267;&#x884C;&#x987A;&#x5E8F;&#x65B9;&#x9762;&#x7684;&#x95EE;&#x9898;&#xFF0C;&#x672C;&#x6587;&#x5C31;&#x5C06;&#x8FD9;&#x4E9B;&#x95EE;&#x9898;&#x6C47;&#x603B;&#x5E76;&#x7528;&#x5B9E;&#x4F8B;&#x9A8C;&#x8BC1;&#x89E3;&#x7B54;&#x3002;</p>
<h2 id="&#x51E0;&#x4E2A;&#x77E5;&#x8BC6;&#x70B9;">&#x51E0;&#x4E2A;&#x77E5;&#x8BC6;&#x70B9;</h2>
<h3 id="catch-&#x7684;&#x5199;&#x6CD5;">catch &#x7684;&#x5199;&#x6CD5;</h3>
<p>&#x5F53; try &#x5757;&#x4E2D;&#x9700;&#x8981; catch &#x591A;&#x4E2A;&#x5F02;&#x5E38;&#x65F6;&#xFF0C;&#x53EF;&#x4EE5;&#x91C7;&#x7528;&#x4E0B;&#x9762;&#x7684;&#x5199;&#x6CD5;&#xFF1A;</p>
<pre><code>        try {
            a();
            b();
        }catch (NullPointerException | ClassNotFoundException |IOException e) {
            Log.e(&quot;Test&quot;,&quot;error&quot;,e);
        }
</code></pre><p>&#x548C;&#x5E38;&#x89C4;&#x5199;&#x6CD5;&#x662F;&#x7B49;&#x540C;&#x7684;&#xFF1A;</p>
<pre><code>        try {
            a();
            b();
        }catch (NullPointerException e) {
            Log.e(&quot;Test&quot;,&quot;error&quot;,e);
        } catch (ClassNotFoundException e) {
            Log.e(&quot;Test&quot;,&quot;error&quot;,e);
        } catch (IOException e) {
            Log.e(&quot;Test&quot;,&quot;error&quot;,e);
        }
</code></pre><h3 id="&#x65E5;&#x5FD7;">&#x65E5;&#x5FD7;</h3>
<p>&#x5728; Android &#x4E2D;&#xFF0C;&#x5F02;&#x5E38;&#x65E5;&#x5FD7;&#x6700;&#x597D;&#x4F7F;&#x7528;&#x4E0B;&#x9762;&#x65B9;&#x5F0F;&#x6253;&#x5370;&#xFF1A;</p>
<pre><code>Log.e(&quot;Test&quot;,&quot;error&quot;,e);
</code></pre><p>&#x6BD4;&#x4F20;&#x7EDF;&#x7684; </p>
<pre><code>e.printStackTrace()
</code></pre><p>&#x5360;&#x7528;&#x5185;&#x5B58;&#x66F4;&#x5C11;&#xFF0C;&#x66F4;&#x5177;&#x6709;&#x6613;&#x8BFB;&#x6027;&#x3002;</p>
<p>&#x4F46;&#x7B2C;&#x4E00;&#x79CD;&#x5199;&#x6CD5;&#x66F4;&#x7F8E;&#x89C2;&#xFF0C;&#x7B80;&#x4ECB;&#x3002;</p>
<h2 id="&#x95EE;&#x9898;&#x63CF;&#x8FF0;">&#x95EE;&#x9898;&#x63CF;&#x8FF0;</h2>
<ol>
<li>&#x5F53;try&#x4E2D;&#x6CA1;&#x6709;&#x51FA;&#x73B0;&#x5F02;&#x5E38;&#x65F6;&#xFF0C;finally&#x5757;&#x4E2D;&#x4EE3;&#x7801;&#x662F;&#x5426;&#x4F1A;&#x6267;&#x884C;&#xFF1F;</li>
<li>&#x5F53;try&#x6216;&#x8005;catch&#x4E2D;&#x6709;return&#x65F6;&#xFF0C;finally&#x662F;&#x5426;&#x4F1A;&#x6267;&#x884C;&#x3001;&#x4EE5;&#x53CA;&#x6267;&#x884C;&#x987A;&#x5E8F;&#x5982;&#x4F55;&#xFF1F;</li>
<li>&#x5982;&#x679C;try&#x6216;&#x8005;catch&#x4E2D;&#x6709;return&#x65F6;&#xFF0C;finally&#x4E5F;&#x6709;return&#x65F6;&#xFF0C;&#x4F1A;&#x6267;&#x884C;&#x54EA;&#x4E2A;return&#x3002;</li>
</ol>
<h2 id="&#x95EE;&#x9898;&#x89E3;&#x7B54;">&#x95EE;&#x9898;&#x89E3;&#x7B54;</h2>
<h3 id="&#x95EE;&#x9898;1">&#x95EE;&#x9898;1</h3>
<p>&#x8FD9;&#x4E2A;&#x95EE;&#x9898;&#x6BD4;&#x8F83;&#x5BB9;&#x6613;&#x89E3;&#x7B54;&#xFF0C;&#x65E0;&#x8BBA; try &#x4E2D;&#x662F;&#x5426;&#x51FA;&#x73B0;&#x5F02;&#x5E38;&#xFF0C;finally &#x5757;&#x4E2D;&#x7684;&#x4EE3;&#x7801;&#x90FD;&#x4F1A;&#x6267;&#x884C;&#x3002;
finally&#x4E2D;&#x5E38;&#x7528;&#x6765;&#x7528;&#x6E05;&#x5C3E;&#x5DE5;&#x4F5C;&#x3002;</p>
<h3 id="&#x95EE;&#x9898;2">&#x95EE;&#x9898;2</h3>
<p>&#x73B0;&#x5728;&#x6765;&#x8BA8;&#x8BBA;&#x4E00;&#x4E0B;&#x5F53;&#x5F53;try&#x6216;&#x8005;catch&#x4E2D;&#x6709;return&#x65F6;&#xFF0C;finally&#x662F;&#x5426;&#x4F1A;&#x6267;&#x884C;&#x3001;&#x4EE5;&#x53CA;&#x6267;&#x884C;&#x987A;&#x5E8F;&#x7684;&#x95EE;&#x9898;&#x3002;</p>
<pre><code>    private int testTry() {
        try{
            return 1;
        } catch (Exception e) {

        } finally {
            Log.e(&quot;Test&quot;,&quot;finally&quot;);
        }
        return 0;
    }
</code></pre><p>&#x901A;&#x8FC7;&#x4EE3;&#x7801;&#x6D4B;&#x8BD5;&#xFF0C;finally &#x4E2D;&#x7684;&#x6253;&#x5370;&#x662F;&#x53EF;&#x4EE5;&#x51FA;&#x73B0;&#x7684;&#x3002;</p>
<p>&#x4E0B;&#x9762;&#x6765;&#x8BA8;&#x8BBA;&#x4E00;&#x4E0B;finally&#x662F;&#x5426;&#x5BF9;return&#x503C;&#x6709;&#x5F71;&#x54CD;&#x7684;&#x95EE;&#x9898;&#x3002;</p>
<pre><code>    private int testTry() {
        int a = 20;
        try{
            return a;
        } catch (Exception e) {

        } finally {
            Log.e(&quot;Test&quot;,&quot;finally&quot;);
            a = 30;
        }
        return 0;
    }
</code></pre><p>&#x8FD4;&#x56DE;&#x7ED3;&#x679C; 20&#xFF1B;</p>
<h3 id="&#x95EE;&#x9898;3">&#x95EE;&#x9898;3</h3>
<p>&#x518D;&#x6765;&#x770B;&#x4E00;&#x4E0B;&#x5F53;try&#x6216;&#x8005;catch&#x4E2D;&#x6709;return&#x65F6;&#xFF0C;finally&#x4E5F;&#x6709;return&#x65F6;&#xFF0C;&#x4F1A;&#x6267;&#x884C;&#x54EA;&#x4E2A;return&#x7684;&#x95EE;&#x9898;&#x3002;</p>
<pre><code>
    private int testTry() {
        int a = 20;
        try{
            return a;
        } catch (Exception e) {

        } finally {
            Log.e(&quot;Test&quot;,&quot;finally&quot;);
            a = 30;
            return a;
        }
    }
</code></pre><p>&#x8FD4;&#x56DE;30&#xFF1B;</p>
<p>&#x4E0A;&#x9762;&#x4ECB;&#x7ECD;&#x7684;&#x662F;&#x5728;finally&#x4E2D;&#x6539;&#x53D8;&#x8FD4;&#x56DE;&#x7ED3;&#x679C;&#x7684;&#x60C5;&#x51B5;&#xFF0C;&#x90A3;&#x5982;&#x679C;&#x6539;&#x53D8;&#x8FD4;&#x56DE;&#x7ED3;&#x679C;&#x7684;&#x5C5E;&#x6027;&#x5462;&#xFF1F;&#x4F1A;&#x4E0D;&#x4F1A;&#x751F;&#x6548;&#x5462;&#xFF1F;</p>
<pre><code>    private ArrayList testTry2() {
        ArrayList list = new ArrayList();
        try{
            return list;
        } catch (Exception e) {
            Log.e(&quot;Test&quot;,&quot;Exception&quot;);
            return null;
        } finally {
            Log.e(&quot;Test&quot;,&quot;finally&quot;);
            list.add(&quot;a&quot;);
        }
    }
</code></pre><p>&#x8FD9;&#x79CD;&#x60C5;&#x51B5;&#x4E0B;&#xFF0C;finally&#x91CC;&#x9762;&#x5BF9;list&#x7684;&#x6539;&#x53D8;&#x662F;&#x8D77;&#x4F5C;&#x7528;&#x7684;&#xFF0C;&#x8FD9;&#x65F6;&#x5019;&#x6253;&#x5370;&#x8FD4;&#x56DE;&#x503C;&#x7684;size()&#xFF0C;&#x7ED3;&#x679C;&#x662F;1&#x3002;
&#x5982;&#x679C;&#x662F;&#x8FD4;&#x56DE;&#x5F15;&#x7528;&#x7C7B;&#x578B;&#x7684;&#x60C5;&#x51B5;&#x4E0B;&#x4FEE;&#x6539;&#x8FD4;&#x56DE;&#x7ED3;&#x679C;&#x540C;&#x6837;&#x4E5F;&#x662F;&#x4E0D;&#x751F;&#x6548;&#x7684;&#x3002;</p>
<pre><code>    private ArrayList testTry2() {
        ArrayList list = new ArrayList();
        try{
            list.add(&quot;a&quot;);
            return list;
        } catch (Exception e) {
            Log.e(&quot;Test&quot;,&quot;Exception&quot;);
            return null;
        } finally {
            Log.e(&quot;Test&quot;,&quot;finally&quot;);
            list = new ArrayList();

        }
    }
</code></pre><p>&#x8FD9;&#x65F6;&#x5019;&#x6253;&#x5370;&#x8FD4;&#x56DE;&#x503C;&#x7684;size()&#xFF0C;&#x7ED3;&#x679C;&#x662F;1&#x3002;</p>
<p>&#x5F53; catch &#x548C; finally &#x90FD;&#x6709;&#x8FD4;&#x56DE;&#x65F6;&#xFF0C;&#x770B;&#x770B;&#x6267;&#x884C;&#x60C5;&#x51B5;&#x3002;</p>
<pre><code>    private int testTry() {
        int a = 20;
        try{
            a = a/0;
            return a;
        } catch (Exception e) {
            Log.e(&quot;Test&quot;,&quot;Exception&quot;);
            return 0;
        } finally {
            Log.e(&quot;Test&quot;,&quot;finally&quot;);
            a = 30;
            return a;
        }
    }
</code></pre><pre><code>E/Test: Exception
E/Test: finally
E/Test: result = 30
</code></pre><p>&#x8FD4;&#x56DE;30&#xFF1B;</p>

                                
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